Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-46048
Published: May 28, 2026
Vulnerability identifier: #VU132439
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46048
CWE-ID: CWE-772
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to a reference count leak in the caiaq usb audio device initialization path when probing a malformed usb audio device. A local attacker can connect a specially crafted usb device to cause a denial of service.
The issue is triggered on probe failure before the snd_card private_free destructor is assigned, preventing the usb device reference from being released.
How to mitigate CVE-2026-46048
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/21ca595aafa40d3ac70eab1f4cb62cc00ca21657
- https://git.kernel.org/stable/c/50c6a1f05973f56d23280c9d7645a7a5734e0907
- https://git.kernel.org/stable/c/6153878c5255bb69b7d0868105ca078ef13cbcf8
- https://git.kernel.org/stable/c/7a5f1cd22d47f8ca4b760b6334378ae42c1bd24b
- https://git.kernel.org/stable/c/da3b8fd6a202d94fef11a443abc9171c52426a1c